Restriction of business, trade obstruction, interference with trade, limitation of free trade, curtailment of competition, trade infringement, trade embargo, impediment to commerce, control of exchange, obstruction of the marketplace, limitation of market access, hindrance to fair trade, inhibition of economic activity, suppression of market freedom, prevention of trade competition, reduction of market transparency, curbing of business dealings, regulation of market activities, and constraint on commercial transactions are all possible synonyms for the term "restraint of trade." These words indicate limitations or obstructions that inhibit the free flow of goods, services, or capital within a given market, region, or industry.